Finding the Fourth Proportional to 10,862.56, 16,294.64 and 5,320.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,862.56 : 16,294.64 = 5,320.56 : x
2. Step 2: Convert to fraction form
   10,862.56/16,294.64 = 5,320.56/x
3. Step 3: Cross multiply
   10,862.56x = 16,294.64 × 5,320.56
4. Step 4: Simplify right side
   10,862.56x = 86,696,609.80
5. Step 5: Solve for x
   x = 86,696,609.80/10,862.56
6. Step 6: Final answer
   x = 7,981.23